What would someone have to know to build a GUI FLV Converter program for Windows?

Just have no idea from where to start to roll out my own flv conveter to convert开发者_如何转开发 video to flv from other formats.

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This is very broad question. It would help if you narrowed it down to specific areas. But, some guesses:

• become familiar with FFmpeg, the de facto standard open source video conversion utility. It is a command line tool, and you can wrap your GUI around it. You'll need to become somewhat of an expert on all the different options regarding audio and video bit rates, aspect rations, resolution (aka size), audio sampling frequencies, etc.
• become familiar with FLV file meta data issues (and how Flash players use the meta data)
• realize that FLV files days are numbered. MP4/h264 is the future. Newer Flash players like them just so (as do most MP4 capable video players) and are frequently refered to as F4V files.
• select a GUI building tool/framework